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Discuss Cloakroom Extractor Fan in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. TicTax
    Offline

    TicTax New EF Member

    Location:
    Surrey
    Hi All,

    I'm installing a new extractor fan in my downstairs loo. The wall that the fan will be mounted to backs on to my garage and the ducting runs in to there before turning 90 degrees and exiting through the roof. This is a ducting run of around 4m.

    Given that the downstairs loo is just that and doesn't contain a shower, it'll never be humid. Therefore, with a ducting run that long, can I install an axial fan or does it have to be centrifugal? I'd prefer axial because frankly they're less of an eye-sore.

    Thanks in advance for any and all help,
    Robin.
     
  2. Bellendian
    Offline

    Bellendian Regular EF Member

    Location:
    Gatwick
    Building regs don't specify extraction for a wc alone, so I'd suggest that you can do what you like. If you want it to be effective then try to use rigid ducting rather than flexi as it results in lower losses since it's smooth.
     
  3. pirate
    Offline

    pirate Regular EF Member

    Location:
    Glasgow
    I had exactly this problem when my new cloakroom was installed. Builder said I must have a fan, and it is internal, no window. he installed the cheapest, flush fitting fan, and the ducting runs down the cavity wall, under the house and basement, to an outlet on the gable end, in all about 10 metres. Result? The fan extracted the air until the fan stopped running, and the compressed air simply returned through the grille, no use whatsoever...yer far*s just came back!
    I fitted a centrifugal fan, and it does the job very well. It has back-draught shutters, too. Ok, it sticks out from the wall a bit, but it would be possible to recess it. Next time, as I have a nice cavity to work with (ooh, missus!) I will install an inline fan behind the wall, or in the ceiling cavity. BTW, just a Manrose centrifugal fan from screwfix, not expensive, and 15 years on I replaced it last month for exactly the same model.
     
    • Like Like x 2
  4. littlespark
    Offline

    littlespark Electrician's Arms

    Location:
    Scottish Borders
    Just vent into the garage. :D
     
  5. anthonybragg
    Offline

    anthonybragg Electrician's Arms

    Location:
    NORTHAMPTON
    Business Name:
    CHARLTEC ELECTRICAL LTD
    Do you have a fire collar so a fire in the garage does not come into the house?
     
  6. anthonybragg
    Offline

    anthonybragg Electrician's Arms

    Location:
    NORTHAMPTON
    Business Name:
    CHARLTEC ELECTRICAL LTD
    I thought you lived on a ship?
     
  7. pirate
    Offline

    pirate Regular EF Member

    Location:
    Glasgow
    I do! But I am a weekend sailor now.....alas.
     
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